Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5bba2ebe4950bd…

MALICIOUS

PDF

43.9 KB Created: 2020-03-24 03:54:22 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cc1d08fd4367662fa02226419bb5b830 SHA-1: 5bee56c61e5d1c6813fb2ae0f767b12596aa6769 SHA-256: ce5bba2ebe4950bd465b397c03c99da9988a0c58781546f148ec5894d882c033
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. The embedded URLs point to various domains, likely serving as a distribution point for further malicious content or to manipulate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://tkandsandy.com/uploads/1/3/0/7/130775192/130775192.html#ancient+red+dragon+5e+lair+actions
    • http://www.laurenxoluke.com/uploads/1/3/0/8/130874287/8ad6f8834.pdf
    • http://goodvibesholisticwellness.com/uploads/1/3/0/7/130776007/suxadapobawowokad.pdf
    • http://aspire.ejrp.org/uploads/1/3/0/2/130289729/8965006.pdf
    • http://ngabwe.com/uploads/1/3/1/1/131164479/2396088.pdf
    • http://niamaacartistry.info/uploads/1/3/0/7/130739127/2ea2604.pdf
    • http://webdisk.lonemami.com/uploads/1/3/0/6/130603747/fapinifodazejir-rekiluki.pdf
    • http://younglitigator.org/uploads/1/3/0/5/130542863/tofotak.pdf
    • http://wangshangwanlebaijiawangzhan.br3h.com/uploads/1/3/0/7/130775730/jidawifuxaxotulibu.pdf
    • http://yourwellnessbranch.com/uploads/1/3/0/6/130603853/dakikum.pdf
    • http://www.coudeacoude.org/uploads/1/3/0/6/130620560/8401117.pdf
    • http://parquetematicotermales.com/uploads/1/3/0/4/130475973/165c83d12788.pdf
    • http://eco-cityenergy.com/uploads/1/3/0/7/130740537/dujaxunuwesu-zizipesunufafut-wukuxerobador-fageze.pdf
    • http://privacyprerogative.com/uploads/1/3/0/4/130435694/boxosavunelu-rifobu-dawunuwiludan-ralazazub.pdf
    • http://www.stripe-itis.com/uploads/1/3/0/6/130640209/nawafaxigutidok_lovelovo_tudup.pdf
    • http://seasonofsmile.com/uploads/1/3/0/5/130551256/xunuvodupigag.pdf
    • http://vswellcarestaffingagency.com/uploads/1/3/0/6/130639526/fukurob.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083c7.bin
4f976c8f4273518319482449c9dff67e4a0da1f431c45b8e209864fea5a12807		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C7 7368 bytes

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